如何生成随机字母数字字符串？

import random
import string

def generate_random_string(length):
    result = ''.join(random.choices(string.ascii_letters + string.digits, k=length))
    return result

random_string = generate_random_string(10)
print(random_string)

function generateRandomString(length) {
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    let result = '';
    for (let i = 0; i< length; i++) {
        result += characters.charAt(Math.floor(Math.random() * characters.length));
    }
    return result;
}

const random_string = generateRandomString(10);
console.log(random_string);

import java.util.Random;

public class Main {
    public static String generateRandomString(int length) {
        String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        Random random = new Random();
        StringBuilder result = new StringBuilder();
        for (int i = 0; i< length; i++) {
            result.append(characters.charAt(random.nextInt(characters.length())));
        }
        return result.toString();
    }

    public static void main(String[] args) {
        String random_string = generateRandomString(10);
        System.out.println(random_string);
    }
}